This wonder ingredient goes way beyond breakfast, to cooling off spicy dishes, keeping burgers juicy and even helping you make a last-minute cake.

By Lynn Andriani

A Light—But Still Creamy—Mac 'n' Cheese

Sure, you can make swaps to turn this classic comfort-food dish into a healthy dinner, but if you go too far—e.g., using fat-free cheese, or a butter alternative—you may sacrifice the richness. Greek yogurt, though, ensures a finished casserole that's just as thick and filling as traditional versions.